No. Giraffes have a larynx. a voice box, just as we have. But it has long been thought that their long necks made vocalisations impossible. However, apart from their occasional snorting and bleating, the animals, according to a study published a few years ago, are capable of humming at night. The reason no one heard giraffe communication could be because their sound frequency was too low for us to hear.
Male giraffes use their necks as weapons in combat, a behaviour known as “necking”. Necking is used to establish dominance and males that win necking bouts have greater reproductive success. This behaviour occurs at low or high intensity. In low intensity necking, the combatants rub and lean against each other. The male that can hold itself more erect wins the bout. In high intensity necking, the combatants will spread their front legs and swing their necks at each other, attempting to land blows with their ossicones. The contestants will try to dodge each other’s blows and then get ready to counter. The power of a blow depends on the weight of the skull and the arc of the swing. A necking duel can last more than half an hour, depending on how well matched the combatants are.? Although most fights do not lead to serious injury, there have been records of broken jaws, broken necks, and even deaths.
After a duel, it is common for two male giraffes to caress and court each other. Such interactions between males have been found to be more frequent than heterosexual coupling. In one study, up to 94 percent of observed mounting incidents took place between males. The proportion of same-sex activities varied from 30 to 75 percent. Only one percent of same-sex mounting incidents occurred between females
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